Granted Patent
Utility
US 5,658,705 · App. 08/754,286
Image-recording materials with 1,3-sulfur-nitrogen dye releasers
Inventors:
Peter Viski, David P. Waller
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Nov 20, 1996
Inventors
Peter Viski
David P. Waller
Assignee (at issue)
Polaroid Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.